Nozzle for paper-making machines



- 1,17,67 Feb.15,1927. M'DEZURIK 6 3 NQZZLE FOR PAPER MAKING MACHINESFiled Aug. 7, 1924 flya MQfZbJezam/f Bj/i Nev WW Xzorrzeyw PATENTOFFICE.

MATEIAS DEZURI K, O1 SABTELL, MINNESOTA-a NOZZLE FOR PAPER-MAKINGMACHINES.

Application filed August 7, 1924. Serial-No. 730,748.

In the making of paper the stock in the form of finely divided fibermixed with other materials, and a large amount of water, is brought incontact with a fine metal screen, known to the trade and designatedhereafter as wires either in the formof an endless belt, as inFourdriniermachines, or in the form of a cylinder as in other types ofmachines. A portion of water and soluble matter passes through the wire,while the stock 'is deposited on the wire as a thin film ble matter ispartly recovered therefrom. It

is desirable to avoid using fresh water for this purpose, because suchwater if used, would further dilute the white water that had passedthewiresin the paper making process, and would make it moredifficulttorecover the stock from such Water. It is usually desirable not to useany more fresh water than is necessary in any part of the paper makingprocess, but to perform the screen or wire-cleaning operations, and anyother subsidiary o erations with white water, as the water t us usedwill return to or mingle with the white water, or water that has alreadypassed through the wires, and ktherefore carry more or less of the paperstoc Prior to my-invention, it has been difiicult to use the white waterfor cleaning the wires, because the small particles of fiber and other 4material contained therein would clog the openings in the showers thatwere employed for spraying the water against the wires.

The object of my invention, therefore, is to provide a nozzle by the useof a series of which arranged in line across the wire the white watercan be used to shower the wire by an unbroken or continuous sheet or jetcovering the entire width of the wire, without clogging the nozzles,without diminishing the force of the jet after leaving the dischargeopenings and without requiring operation of any auxiliary device forcleaning plugged nozzles, thereby making it unnecessary to use freshwater for cleaning pur- 5 poses either upon Fourdrinier or cylindermachines.

The invention consists in the construction and combination hereinafterdescribed and particularly pointed out in the claim.

In the accompanying drawings forming part of thisspecification,

Fi ure 1 is an elevation of a shower consisting of a series of nozzlesembodying my invention, showing the relation of the same to the wire ofa Fourdrinier machine;

Figure 2 is a transverse section of the device shown in Figure 1;

Figure 3 is a side elevation of one of the shower nozzles;

Figure 4 is a section on the line 44 of Figure 3;

Figure 5 is an end view of Figure 3;

Figure 6 is a View similar to Figure 4, showing one of the end nozzles;

Figure 7 is an end view of Figure 6;

Figure 8 is a modified construction showing a smaller nozzle.

In the drawing, 1 represents .a nozzle forming one of the shower units.Each nozzle has a c lindrical bore, of uniform diameter, exten ingthrough it up to the discharge opening. A pipe 6 is connected with amain supply pipe 5, by a coupling and valve connection 7. The nozzlesare preferably vall arranged in the pipe section 6 in a single plane andwith their discharge openings in line with one another as indicated inFigure 1. One end of each nozzle is preferably contracted and isoutwardly flared as shown at 4; and an elon ated discharge opening 2 isprovided in this end; its ends extending backward to points on a planeextending transversely through the full diameter of the unit (see Figure4, line ab).

As will be seen by an examination of Figure 5, the discharge opening isslightly greater than the inner diameter of the nozzle forming the unit(Figure 5). The lips 3, at the discharge opening of each nozzle are inparallel planes, and are spaced from each other a suitable distance,determined by the size of the fiber or paper making material used.

With this construction and arrangement, the white Water passing throughthe shower unit is spread out into a comparatively thin and uniformsheet with undiminished force, and the nozzles being pro erly spaced theedges of the sheet from each nozzle meet the edges of the sheet from thetwo adjoining nozzles, thereby forming a continuous and solid sheet thefull length of the shower, and

the full width of the wires to which the shower is applied. Also withthis construction and arrangement white water from'the machine pits ormachines may be employed altogether for cleaning the wires. With. the

shape, arrangement and size or the discharge openings of the nozzles,white water direct from machine pits or machines may be used withoutreducing amount of fibers or consistency of the white water by use ofsaveallsr Each nozzle is preferably provided with threads 8 for'securingit to the pipe 6.

I am therefore able with a showercomprising a series of these nozzles touse white water from machine pits, machines or savealls entirely forcleaning the wires and without the units becoming clogged or choked withthe fiber or material carried by the white water and with undiminishedforce after leaving discharge openings of nozzles. By mounting the pipe6 so that it can turn in its bearings the angle at which the sheet ofwater strikes the wire can be varied, as indicated in Figure 2, to getthe greatest cleaning efiect. The end nozzles 1 of each shower unit arepreferably provided with a relatively shorter discharge opening 2 asshown in Figures 6 and 7, thereby to prevent the nozzle from spreadingthe water on the side adjacent the edge of the wire belt.

In Figure 8 there is shown a nozzle of modified construction. Thisnozzle is similar in general outline to the nozzle shown in Figures 3, 4and 5 but is relatively smaller in size.

I claim as my invention:

A shower nozzle for washing paper making machine screens with whitewater consisting of a cylindrical body portion having an axial bore ofuniform diameter throughout and a terminal discharge portion contractedin one dimension and having its opposite dimension not substantiallyexceeding the diameter of said cylindrical body portion, said dischargeportion having a discharge slot defined by parallel lips and coextensivewith its greatest dimension and extending substantially to thecylindrical portion, said discharge slot being sufficiently large toprevent'clogging of the nozzles by the fibers and other foreign materialin the white water.

In witness whereof, I have hereunto set my hand this 31st da of July1924,

- MA HIAS DEZURIK.

